Pure bliss

Just the opening sequence of Bioshock 2, more specifically when Subject Delta kills himself and then comes back to life in the Vita Chamber and just begins wreaking havoc. I support a dedicated dad.

ACHIEVEMENT UNLOCKED: The Part Where He Kills You

Completing the NCR questline by not wiping out The Great Khans and Brotherhood of Steel and pissing off Colonel Moore. Her reaction is the best.

In The Last of Us 2, breaking windows / glass planes and entering through them instead of using doors or open hallways. The glass physics are incredible and I spent too long just breaking them instead of playing the game

The platinum trophy for Outlast 2 is 'Omnipotent'

In The Last of Us during the opening sequence, whilst watching the News Report you can see the explosion occur in the distance at the same time

In Fallout New Vegas, during the quest "I Could Make You Care" if you opt to get the Pulse Gun and then fight the hostile Paladins you can easily kill them using the Pulse Gun. I find it hilarious they didn't think that far ahead about C6 and Veronica having a weapon that'll render their protection useless